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Iodine solution turns blue black.

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Important Questions on Components of Food

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Science>Biology>Components of Food>Biochemical Tests
A food item turns blue-black when iodine is added to it. It confirms the presence of _____. 
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Science>Biology>Components of Food>Biochemical Tests
Define bleaching.
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Science>Biology>Components of Food>Biochemical Tests

How can we test the presence of the following nutrient?

Starch

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Science>Biology>Components of Food>Biochemical Tests
The colour of iodine solution is 
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Science>Biology>Components of Food>Biochemical Tests
Iodine is used to test the presence of sugar in leaves.
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Science>Biology>Components of Food>Biochemical Tests

On coming in contact with starch, iodine changes its colour to _____.

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Science>Biology>Components of Food>Biochemical Tests
A starch solution on adding a few drops of iodine solution, turns _____.
MEDIUM
Science>Biology>Components of Food>Biochemical Tests
The chemical used to test the presence of starch in a given food sample is
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Science>Biology>Components of Food>Biochemical Tests
Green leaves can be _____ (bleached/brighten/darken) using alcohol.
MEDIUM
Science>Biology>Components of Food>Biochemical Tests
On adding iodine solution to starch, it _____.
MEDIUM
Science>Biology>Components of Food>Biochemical Tests
How will you test the presence of starch in a piece of potato?
MEDIUM
Science>Biology>Components of Food>Biochemical Tests
_____ solution is used to test the presence of starch in a leaf.
MEDIUM
Science>Biology>Components of Food>Biochemical Tests
How can you experimentally demonstrate that leaves contain starch?
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Science>Biology>Components of Food>Biochemical Tests
For the protein test, we add _____ solution along with caustic soda solution.
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Science>Biology>Components of Food>Biochemical Tests
How will you test toor dal for protein?
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Science>Biology>Components of Food>Biochemical Tests
Water is used to test the presence of starch in a leaf.
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Science>Biology>Components of Food>Biochemical Tests
The chemical(s) needed to test the presence of protein in a food item is/are _____.
MEDIUM
Science>Biology>Components of Food>Biochemical Tests
When a few drops of iodine solution are added to a boiled potato, it turns_____.
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Science>Biology>Components of Food>Biochemical Tests
Iodine solution turns bluish-black in the presence of starch.
MEDIUM
Science>Biology>Components of Food>Biochemical Tests
Food materials that turn blue-black on addition of iodine solution confirm the presences of